using 45w power adapter on the new MBP

Discussion in 'MacBook Pro' started by ExcelonGT, May 6, 2010.

  1. ExcelonGT macrumors regular

    Joined:
    Feb 9, 2008
    #1
    I had an extra 45w power adapter in my office; which I used to use with my Macbook Air. So today, I mated it to my new i7 MBP15 and was expecting it not to work because of insufficient power. But it seems to work just fine.

    Is there any harm in using the 45w power adapter at work and the 85w adapter on the road\home? I'm assuming the 45w adapter just wont charge the battery as fast.:confused:
     
  2. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #2
    No harm, it will just charge slower.

    MRoogle is quite a good tool to search these fora and it would have brought up dozens of threads asking the same question.
     
  3. andrew086 macrumors regular

    Joined:
    Dec 31, 2009
    #3
    hmm... how come when I plugged in a 60 watt charger into mine it just said "not charging?"
     
  4. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #4
    I don't know, but I have used 60W adapters with my MBP in the past, and I even used a 60W today with my MBP (that originally has a 85W adapter). Maybe yours is broken somehow?
    Have you checked if it charges nonetheless?
     

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